INDICE DE COSECHA EN TRIGO DE PRIMAVERA

Abstract

Harvest index values were studied in eight cultivars and two lines of spring wheat, and the determination of plant components most strongly iníluencing it. The mean harvest index value of 43.2% was found with a range from 39.7 to 49.3%. Differences at the 1% level of probability were observed. Stems contributed with the greatest amount of dry weight to the straw yield, 28%. The leaves contributed nearly as much as the chaff, 14 and 15% respetcively. Reduction in plant height lowered the stem dry weight which resulted in an increased harvest index. Harvest index was negatively correlated with plant height and stem dry weight. There was not significative correlation between harvest index and grain yield.